Paper-guide for type-writing machines.



J. A. HAGERSTROM. PAPER GUIDE FOR TYPE WRITING MACHINES. M APPLICATION FILED AUG. I4. 1917. w XTIITII'I m Patented Mb. 18, 1919.

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PAPER GUIDE FOR TYPE WRITING MACHINES. APPLICATION FILED AUG. 14. 1917.

D Patented Feb. 18, 1919.

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JOHN A. HAGEESTROM, 0F SCRAINTON, PENNSYLVANIA, ASSIGNOR T0 VICTOR TYPE- WRITEE, COMPANY, OF SCRANTON, PENNSYLVANIA, A CORPORATION OF NEW YORK.

PAPER-GUIDE FOR TYPE-WRITING MACHINES.

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Specification of Letters Patent.

Patented Feb... is, rate.

Application filed August 1%, 1917. Serial No. 1%,165.

To all whom it may concern:

Be it known that 1, Joint A. HAennsrRoM, a citizen of the United States, and resident of Scranton, in the county of Lackawanna and State of Pennsylvania, have invented certain new and useful Improvements in Paper-Guides for Type'Writing Machines, of which the following is a speclfication.

My invention relates to typewritmg machines and particularly to marginal paper guides or fingers for typewriting machines.

Marginal paper guides or paper fingers are usually mounted on the carriage so as to be shiftable longitudinally of the platen in order to accommodate work sheets of various widths. In order to adjust the machine for a work sheet of a width less than the width of the platen, either one or both of the marginal paper fingers may be shifted inwardly. When, thereafter, a full width work sheet is employed, it becomes necessary to return the paper fingers to their normal positions at the ends of the platen, as otherwise the fingers will cover a portion of the impression surface. If a type should strike a paper finger instead of the platen, it would, of course, make no impression on the work sheet and furthermore would be dulled.

My invention has for an object to provide automatic means for increasing the interval between the paper fingers to correspond with any increase in width of successively inserted work sheets.

Another object is to provide means for preventing the discoloration of the work sheet by protecting the feed rollers of the nth paper fingers from the fingers of the operator.

In the broadest aspect, that part of my invention which relates to automatically shift ing the paper fingers, comprises interengaging means carried respectively by paper fingers and by the main or stationary portion of the typewriter, said means being so disposed with respect to one another as to interengage during the feeding of the carriage whenever the paper fingers are displaced to ward the center of the machine.

In the accompanying drawings, l[ havev illustrated one manner of putting my invention into efiect. It will be understood, however, that within the limitations of the claims the mechanical details may be modified in various ways.

In the drawings,

Figure 1 is a front elevation of a typewriter carriage, in which for greater clearness, all parts in front of line 1-1 of Fig. 2 and other parts not essential to an understanding of my invention are omitted;

Fig. 2 is a plan view, the platen and all parts above the line 11-11 of Fig. 1 having been omitted;

Fig. 3 is a transverse sectional view; and

Fig. 4: is a rear elevation of a paper finger and its supporting bar.

Referring more particularly to the drawings, the carriage frame comprises end plates 1, 1 joined together by channel bar 2. Platen 3 is mounted on shaft 4 which is journaled in the end plates 1, 1. Scale bar 5 is attached at its ends to end plates 1, 1 by means of screwsfi, 6 and serves as a supporting rail for marginal uides or paper fingers 7, 7. Paper fingers 7, plates of sheet metal slotted to form the legs 8 and 9 and having upwardly projecting and inwardly offset portions 10. Attached to the edges of members 10 or integral therewith and extendin rearwardly therefrom are plates 11 (see Figs. 3 and i), between which are journaled shafts 12 supporting rollers 13. The said rollers may be of any desired construction, such as for example a wooden hub covered with arubber bearing surface. Plates 10 are preferably curved partially around rollers 13, as shown, thereby constituting-with the side plates 11, a guard for the rollers 13. In grasping the paper fingers for the purpose of adjusting them, the operators fingers are prevented from touching the rollers 13, thus keeping them clean. V

Referring now to the manner of attaching the paper fingers to the scale bar or rail 5, it will be noted that member 8 has at its lower end a laterally projecting arm 14': comprising a main plate with a forwardly projecting flange 15. From the forward edge of the flange 15, lugs 16 extend upwardly. The scale bar 5 has at its upper and lower edges, rearwardly extending flanges which form a groove or channel 17. Pins 18 are rigidly carried by arm 14: and support rollers 19. Rollers 19 are so pro portioned as to run easily in grooves 17 and have a transversely rounded tread to per- 7 as shown, comprise thin mit the rocking movement of the paper fingers hereinafter referred to. Member 9 is bent forwardly out of the plane of the member 10 and consequently when forced into position in the rear of scale bar 5, it constitutes a spring tending to force the paper finger against the platen see Fig. Similarly, when the paper finger is pulled forward, the m'ember 9 will yield and force the paper finger against the platen as soon as it is released. The paper fingers thus described in common with other devices of this character, are adapted to travel with the carriage in its motion to and fro, but

so as to vary the 1n-' may be shifted thereon terval between them.

Projecting downwardly from the arms 14: are wedge-shaped members 20 having their innereedges 21' perpendicular to the scale bar 5, while their outer edges 22 are oblique thereto. Located beneath the scale bar 5 and in the path of the projections 20 is a detent 22 which is pivotally mounted on the shaft 28. Shaft 23 is rigidly attached at one end to bracket 24, the bracket being carried by the usual or any desiredform of case-shifting mechanism (not shown), so that the detent 22 rises and falls with the platen and associated parts and is therefore always in the line of travel of the projections 20. Detent 22 is held normally in horizontal position by the spring 25, which is coiled around shaft 23 and tends to throw the detent upwardly. Beneath the pivot the detent 22 has a lateral extension 26 whose outer end 27 is turned up and perforated so as to embrace the shaft 23, thereby giving the detent 22 additional rigidity with respect to strains in theaxial direction. The upward movement of detent 22 is stopped by the abutment of extension 26 against bracket 28 (Fig. 3). v

Tl Whenever for any reason the paper fingers 7 or either of them, has been shifted inwardly, it or they as the case may be, will be automatically returned to their respective marginal positions at the end of the platen in the course of the first complete trip of the platen across the machine in each direction. For example, if the left hand paper finger 7 be displaced, as shown in Fig. 1, the first shifting of the platen carriage to the right as far as it will go will cause projection 20 to engage detent 22, whereupon the movement of paper finger 7 with the platen will be arrested, the platen in the meantime continuing to move to the right until the paper finger is in its normal osition near the leftend of the platen. n the construction shown, the left paper finger cannot be shifted to the right far enough to bring its projection 20 to the right of detent 22. The right paper finger 7, however, may be shifted to the left into the dotted position shown in Fig. l, in

ie operation of my device is as follows:

which case it will be observed that its projection 20 is to the left of detent 22. Ordinarily this will only occur by accident when the platen carriage is removed from the ma chine. It may frequently happen, however, even if unintentionally, where two or more platen carriages are used alternately with th same machine as is sometimes done. In. such a case, the first movement of the carriage to the right will bring the projection 20 past detent 22, the detent being deflected downwardly. Subsequently, when the platen is moved to the left, projection 20 will be stopped by detent 22 and the paper finger will be returned to its position near the right end of the platen.

Many obvious mechanical equivalents for the constructions described above will occur to any skilled mechanic. For example, the particular directions in which the projections 20 and detent 22 are presented are not essential, it being necessary merely that the detent be located in the path of the projections. Moreover by a simple modification, the incline surfaces 29 may be transferred to the detent. Also it is obvious that the projections could be yieldingly mounted instead of the detent.

I claimz- 1. In a typewriting machine, the combination with a carriage, of a paper finger normally traveling with the carriage, but slidable thereon, and means located in the path of said paper finger for arresting the movement of the paper finger when the carriage is shifted in one direction, said finger and means being adapted to avoid engagement when the carriage is shifted in the opposite direction.

2. In a typewriting machine, the combination with a carriage, of a paper finger normally traveling with the carriage, but slidable thereon, and means located in the path of said paper finger for arresting the movement of the paper finger when the carriage is shifted in one direction but permitting the paper finger to pass without being shifted when the carriage is shifted in the other direction.

3. In a typewriting machine, the combination of a carriage, a pair of paper fingers normally traveling with said carriage but transversely shiftable thereon, stationary means located in the path of said paper fingers, said paper fingers being respectively displaceable by said stationary means 'by carriage-shifting movements in opposite directions, each of said fingers being adapted to pass by said stationary means without displacement when said carriage is being shifted in a direction. which displaces the other finger.

4. In a typewriting machine, the" combination of a carriage, a left and right marginal paper fingers normally traveling with Ill-ll moment the carriage, but shiftable thereon, and a stop located in the path of the paper fingers, said stop shifting the left marginal paper finger when the carriage is shifted to the right and the right marginal paper finger when the carriage is shifted to the left, and means operated by either of said marginal paper fingers when the carriage is shifted toward that finger,

5.. ln a typewriting machine, the combination of a carria e, a marginal paper finger normally trave ing with the carriage but shiftable thereon, a stop, said marginal paper finger and stop being held in engagement to displace said marginal paper finger by the movement of said carriage in one directionand movable momentarily into and out of engagement without shifting said marginal paper finger by the movement of said carriage in the opposite direction.

6. lln a typewriting machine, the combination of a carriage, left and right marginal paper fingers normally traveling with thecarriage, but shiftable thereon, wedgeshaped projections carried by said paper fingers, said projections having inner engaging edges perpendicular to their line of travel and outer engaging edges oblique to their line of travel, a detent mounted in the path of said projections, but displaceable out of the said path, and means tending to maintain said detent in the said path, substantially as and for the purpose described.

7. In a typewriting machine, the combination of a carriage, left and right marginal paper fingers normally traveling with the carriage, but shiftable thereon, wedgeshaped projections carried by said paper fingers, said projections having inner engaging edges perpendicular to their line of travel, and outer engaging edges oblique to their line of travel, a detent mounted in the path of said projections and in perpendicular relation to their inner engaging edges, said detent being displaceable out of the path of the said projections, and means tending to maintain said detent in said path. v

8. lfn a typewriting machine, the combination of a carriage, left and right marginal paper fingers normally traveling with the carriage, but shiftable thereon, wedgeshaped projections carried by said paper fingers, said projections having inner engaging edges perpendicular to their line of travel and outer engaging edges oblique to their line of travel, a stationary shaft parallel to the line of travel of said projections, a detent pivotally mounted on said shaft and extending perpendicularly therefrom into the path of said projections, a stop limiting rotation of said detent in one direction and a spring holding said detent against said stop.

9. In a typewriter, a reciprocatory carriage, a marginal paper finger movable along said carriage, a stop relatively to which the carriage reciprocates, and which is movable into and out of the path of said marginal paper finger, said marginal paper finger being adapted to be unyieldably engaged by said stop to displace said marginal paper finger when said carriage is shifted in one direction and to displace said stop momentarily to avoid being shifted when the carriage is moved in the opposite direction.

10. In a typewriter, the combination with a carriage provided with a platen and a bar extending longitudinally of said platen. of a paper finger slidably mounted on said bar, said paper finger comprising a strip extending fiatwise partly around said platen to render it yieldable and having parallel ears struck down from its upper end to form bearing lugs arranged edgewise to said platen, and a roll journaled in said bearing lugs or cars, said paper finger having a portion thereof between said bearing lugs or ears concentric with the journaling axis of said roll.

JOHN A. HAGERSTROM.

"Witnesses:

H, B. Monmenn, MARY C. Roman. 

